如图,在⊙O中,尺规作图的部分作法如下:(1)分别以弦AB的端点A、B为圆心,适当等长为半径画弧,使两弧相交于点M;(2)作直线OM交AB于点N.若OB=10,AB=16,则tan∠B等于( )
![](https://img.xkw.com/dksih/QBM/2021/7/29/2774496322412544/2774591323963392/STEM/b5a65ded73ad4bfd939db03781cec188.png?resizew=150)
![](https://img.xkw.com/dksih/QBM/2021/7/29/2774496322412544/2774591323963392/STEM/b5a65ded73ad4bfd939db03781cec188.png?resizew=150)
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2021·广西百色·中考真题 查看更多[6]
广西百色市2021年中考真题数学试卷(已下线)专题7.1 正切-2021-2022学年九年级数学下册链接教材精准变式练(苏科版)2022年贵阳市中考押题卷(二)(已下线)考点32 尺规作图-备战2022年中考数学一轮复习考点帮(全国通用)广东省揭阳市揭西县宝塔学校2021-2022学年九年级下学期数学第一次月考(已下线)重难点04“垂径定理”模型-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)
更新时间:2021-07-29 11:43:24
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【推荐1】如图,在
中,
,
,分别以点A和点C为圆心,大于
的长为半径画弧,两弧相交于点M,N,作直线
,交
于点D,连接
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/020b90cf-7825-466c-a245-9ee66fc0dcf4.png?resizew=255)
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【推荐2】已知:如图1,在△ABC中,AB=AC.小明的作法如图2所示,则他作出的两条线的交点O是△ABC的( )
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983559614382080/2992486604972032/STEM/182ada18-e6f8-4e88-a163-3c20a0d44f83.png?resizew=268)
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【推荐1】如图所示,四边形
的对角线
,
互相垂直,若
,
,
则
的长为( )
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【推荐2】小明想知道一块扇形铁片
中的
的拱高(弧的中点到弦的距离)是多少?但他没有任何测量工具,聪明的小明观察发现身旁的墙壁是由
的正方形瓷砖密铺而成(接缝忽略不计).他将扇形
按如图方式摆放,点
恰好与正方形瓷砖的顶点重合,根据以上操作,
的拱高约是( )
![](https://img.xkw.com/dksih/QBM/2022/4/23/2964552624840704/2967279378784256/STEM/667598771a234610b126e5721beac371.png?resizew=217)
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【推荐1】
在网格中的位置如图所示(每个小正方形边长为1),
于D,下列四个选项中,错误的是( ).
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